Gas-burning stove.



PATENTED APR. 2, 1907. V. W. BLANCHARD. GAS BURNING sToVE.

APPLICATION FILED JAN. 22, 1906.

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a. l 0 U0 00 00 0D 0 00 O0 O 00 00 0 00 00 0 0 witneaoeo UNITED STATES PATENT @BEIGE GAS-BURNING STOVE.

Specification of Letters Patent.

Patented April 2, 1907..

Application filed January 22,1906. Serial No. 297,272.

T0 all whom, it 19m/y concern:

Be it known that I,V1RG1L WV. BLANCHARD, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Gas-Burning Stoves; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is an improved gas-burning stove designed to produce highly -heated gases in large quantities and to be used for a heating o r cooking stove and for other purposes where highly-heated gases are deisred. Its objects are to insure thorough combustion of all the oxidizable elements in the gas supplied to the burner, to concentrate the heat around the burner, so that the air admitted into the burner-chamber will become highly heated to provide novel means for igniting the gases around the exterior of the apparatus, and to provide novel means for keeping the burner hot while it is not in full operation by what may be termed a simmering burner.

The invention consists in the novel constructions and combinations of parts, as hereinafter shown, described, and claimed.

The accompanying drawings illustrate au apparatus embodying the invention, from which it may be readily comprehended, though the invention is not restricted to a particular construction of parts illustrated in said drawings.

Figure l is a vertical central section of the complete apparatus. Fig. 2 is a transverse section on line 2 2, Fig. l.

On a base-plate A, of any suitable construction, is mounted a cylinder B, which may be of any desired crosssection, and within this cylinder a slight distance above base A is a transverse partition b, provided with openings b for the admission of air into the burner-chamber. Below the partition l) are openings B in the walls of the cylinder B, through which air is admitted below the partition b to the opening e therein.

Above the partition t and adjacent the top of the burner chamber is an annular plate B2, and the walls of the cylinder between the plate B2 and the partition l) are preferably constructed to prevent the loss of heat by radiation or conduction, as follows: Supported upon the partition b is an inner cylinder B3 of metal, and the space between the cylinders B and B3 is iilled with non-heat-conducting material, preferably layers of asbestos b2, and between some of these layers of asbestos may be place d layers B3 of wire-gauze or perforated metal. By this means a thick non-heat-conducting wall is formed, by which loss of heat by radiation and conduction is prevented, and consequently the burner-chamber 3, within the cylinder B3 can become intensely hot without any great rise in temperature of the exterior cylinder B. Above the plate B2 is a perforated partition-plate B4, which can be supported upon collars B5, attached to cylinder B or resting on plate B2, so as to leave an air-space between the plate B2 and partition B4. Suspended from this partition BA1 is a burner C, which is preferably constructed, as described in my application for gas-burners, Serial N o. 297,240, iiled January 22, 1906, having a receiving-hood C on its lower end and provided with a pluralityof perforations c and internal annular constrictions c', so that the heated gases passing upwardly through the burner are caused to alternately expand and contract in passing these constrictions and are subjected to the action of numerous 'line liets of air entering thereinto through the perforations c.

The burner C may be surrounded by an annular jacket C, supported upon the hood C and having apertures c3 at its lower edge for the admission of air into the space between the acket and burner, this space forming an air-heating chamber in which the air supplied to perforations c becomes intensely heated before passing into the burner.

Gaseous mixtures are discharged into the lower end of the burner 'from mixing-tubes D D D, which are respectively connected to primary i'nixiug-tubes (l, cl, and d2, which are connected to suitable gas-supply pipes which are connected to a header E, which may in turn be connected to a gas-fixture in the building or other gas-supply, said pipes d, c?, and (Z2 being provided with valves e, e, and c2, by which the supply of gas can be regulated or cut off, as desired. The primary or secondary gas-mixing tubes are preferably constructed as shown and described in my application for gas-burner, Serial No. 297 ,238, filed January 22, 1906. In this instance, however, the tube I)2 is very small and forms what I term a simmering burnerH and is intended to be used to light the other burners and to keep the burner warm when only a very small degree of heat is desired, the

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large tubes D D being used when the apparatus is operated at full capacity. If it be desired to suddenly increase or reduce the amount of gas being burned without entirely cutting off the gas-supply, the tubes D and D can be cut off, While that at D2 may be continued, as it will burn only a very small quantity of gas, but will cause ignition of any gas turned on through tubes D and D. As a matter of-fact the apparatus is not restricted to the employment of any particular number of these gas-mixing tubes. One or more may be used, or their number may be varied to suit the size and capacity of the stove desired.

In order to primarily ignite the gas without having to open up the stove, I provide a pilot-pipe F, which opens into the hood C at a point directly over the tubes D D D2 and extends to the outside of the apparatus and is provided exteriorly with a valve lVhen starting the stove, the gas is turned on through the tubes D D D2 while pipe F is open. Naturally a small quantity of gas passes therethrough to the exterior, where it can be lit with a match and, iring back through the pilot-tube, it ignites the gases discharged into the hood. Thus the necessity of any igniting-doors is avoided, though, if desired, doors may be provided in the sides of apparatus.

The burner discharges the heated products of combustion above the partition B4 and under a superimposed dome-shaped plate BG, which is supported in position in any suitable manner. As shown, it is provided with a depending lange B7, provided with apertures t7 at its lower edge, whereby the gases can escape laterally around the edges of the domeshaped plate, and thence they can pass, in the example shown, through apertures in the top plate H of the exterior casing of the stove, which may be of any suitable construction and, as shown, is provided with openings h for the escape of the gases. rlhe construction of the upper portion of the stove above the dome-shaped plate BG is not a material feature ofthe present invention.

The cylinder B is surrounded by a casing G, separated from the cylinder by an airspace 2, said cylinder G being supported on the base A and is preferably imperforate at its lower end, while at its upper end and above the partition B4 it is provided with openings G for the admission of air, the supply of air being regulated by an annular valve G2. The walls of the casing below the air-inlet openings may be lined with nonheat-condueting material. As shown, they have a lining g of asbestos and an interlining of sheet metal g2. Thus loss of heat by external radiation is practically entirely prevented from the lower part of the stove.

The air entering the openings G is heated by contact with the highly-heated wall of cylinder B between the plate B2 and partition B4. It then descends in space 2 and passes through openings B binto the burnerchamber 3, where it becomes highly heated by heat radiated Jfrom the burner and by contact with the highly-heated part within the stove. Part of the air is supplied to the burner to support combustion, as described. Other portions of the air ascends into the chamber between the plates B2 and partition B4 and then pass upwardly through the apertures in partition B4 into the hot currents oi gases discharged from the burner and insures the complete oxidation of all the combustible elements in the gases.

The resultant large quantities of highlyheated gases mixed with air are discharged from the stove into the room or into the utilizing device 'with which the stove may be connected. The stove of the character described is particularly useful in connection with the range shown in my application, gas cooking stoves or ranges, Serial No. 297,251, filed January 22, 1906, and the heat storing and accumulating chambers shown in my applications for cooking apparatus, Serial No. 297,253, iiled January 22, 1906.

Having described my invention, what l claim as new, and desire to secure by Letters Patent, is-

1. The combination in a gas-burning stove, of a base, a cylinder supported thereon, a partition in the cylinder above the base provided with openings for the passage of air, a plate above said partition, a cylinder between the partition and the plate, and a non-heat-conducting packing lilling the space between the inner and outer cylinders.

2. The combination in a gas-burning stove, of a base, a cylinder supported thereon, a partition in the cylinder above the base provided with openings Jfor the passage of air, said cylinder having openings in its wall below the partition, a plate above the partition, and a cylinder between the partition and the plate; with a burner suspended within the second cylinder, a dome-shaped plate above the burner, and means for discharging mixtures oi?l gas and air into the lower end of said burner.

3. rIhe combination in a gas-burning stove, of a base, a cylinder supported thereon, a partition in the cylinder above the base provided with openings for the passage of air, a plate above said partition, a cylinder between the partition and the plate, and a non-heat-conducting packing iilling the space between the inner and outer cylinders; with a burner suspended within the second cylinder, a domeshaped plate above the burner and means for supplying mixtures of gas and air into the lower end of said burner.

4. In a gas-burning apparatus, the combination of a base, a cylinder supported thereon having an internal burner-chamber and TOO non-heat-conducting walls surrounding said chamber, a casing inclosing the said cylinder but leaving an air-sp ace between the cylinder and casing7 said casing having air-inlet openings in its upper end, and a valve for regulating the admission of air through said openings.

5. In a gas-burning apparatus, the combination of an internal burner-chamber, nonheat-conducting walls surrounding said charnber, a casing inclosing the said walls, but leaving an air-lue between the walls and casing, the latter being provided with air-inlet openings in its upper end, and a valve for regulating the admission of air g with a perforated partition above the burner-chamber, a burner suspended from said partition, and means for discharging mixtures of gas and air into said burner.

6. In a gas-burning apparatus7 the combination of a base, a cylinder supported thereon having an internal burner-chamber and non-heat-conducting walls surrounding said chamber, a casing inclosing the said cylinder, but leaving an air-space between the cylinder and casing, the latter being provided with airinlet openings in its upper end, and a valve for regulating the admission oit' air through said openings; with a perforated partition above the burner-chamber, a burner suspended from said partition within the burnercharnber, and a mixing-tube for discharging gas and air into the burner.

7. In a gas-burning stove, the combination of a base, a cylinder supported on said base, a partition in the said cylinder, an annular plate above the partition, a small cylinder interposed between the annular plate and the partition, a non-heat-conducting packing between the inner and outer cylinders, a perforated plate above the annular plate, a burner suspended from said perforated plate, and a delecting-plate above the burner.

S. In a gas-burning stove, the combination of a base, a cylinder supported on said base having openings in its lower end, a partition in the said cylinder above said opening, also Lprovided with air-inlet openings, an annular plate above the partition, a small cylinder imposed between the annular plate and the partition, a non-heat-eonducting packing between the inner and outer cylinders, a perforated plate above the annular plate, a burner suspended from said perforated plate and means for suppl ying mixtures of gas and air to said burner.

9. In a gas-burning stove, the combination of a base, a cylinder supported on said base having openings in its lower end, a partition in the said cylinder above said openings and provided with air-inlet openings, an annular plate above the partition, a smaller cylinder interposed between the annular plate and the partition, a plate above the annular plate, a burner suspended in the smaller cylinder, a de'lecting-plate above the burner; with an exterior casing surrounding said cylinder, leaving a space between the casing and cylinders forming a descending air-ilue; the casing having apertures for admitting air to said ilue, and a top plate for the casing provided with outlets for the heated gases.

l0. In a gas-burning stove, the combination of a base, a cylinder supported on said base having openings in its lower end, a partition in the said cylinder above said openings provided with air-inlet openings, an annular plate above the partition, a small cylinder interposed between the annular plate and the partition, a non-heat-conducting packing between the inner and outer cylinders, a perforated plate above the annular plate, a burner suspended from said perforated plate and a deflecting-plate above the burner, and means for supplying mixtures of gas and air to said burner; with a casing surrounding said cylinder, but leaving air-flue between the casing and cylinders, the former having apertures in its upper end for admitting air to said flue, and a top plate above the distributing-plate provided with outlets for the heated gases.

In testimony that I claim the foregoing as my own I ailix my signature in presence of two witnesses.

VIRGIL WV. BLANCHARD.

In presence of- JAMEs R. MANSFIELD, L. E. VITHAM. 

